Tomás "Tommy" Joseph Harris (10 April 1908 – 27 January 1964) was a British art dealer and artist, who also served as an MI5 intelligence officer during World War II.

Born of a Spanish mother, Enriqueta Rodriguez, and an English father, Lionel Harris, an art dealer specialising in Spanish paintings, he grew up in a Jewish household in Hampstead, his mother having converted to Judaism at the time of the marriage,[1] Harris continued his father's successful art dealing business, and was essentially an amateur artist himself.

[9] In a letter dated 8 September 1981[10] to Dick Brewis, Brian Sewell wrote: “I had a very long and confidential conversation with an old friend and contemporary of Tomas H last night.

It seems clear that TH was involved in espionage, but for the Americans and not the Russians: at his death MI5 managed to suppress information about work done specifically for Eisenhower details of which were know to one particular obit writer.” The “old friend” was probably Anthony Blunt.

Together they made up a fictional team of 27 fake sub-agents, who were created in order to convince German intelligence that Garbo was a reliable spy.